如何在WSO2 ESB 4.9.0中的JMS代理上设置限制

Question

We are facing an issue with MQ JMS proxy in WSO2 ESB 4.9.0 when bulk messages are pilled up on Queue.

Back end services invoked by proxy can process only 50 requests per second and beyond that our back end services will fail.

The issue here is, when messages are pilled up on the Queue (1000messages), proxy is reading all the messages from the queue and sending to back end services & back end services are failing.

Is there any setting that we can set to on proxy to control message read by proxy service.

Here the main problem is proxy is very quick to read messages from Queue and flooding back end services. Back end services are failing because they are not designed to handle higher load

Answer 1

如果您需要侦听JMS队列并想以受控方式将消息发送到后端服务，则必须使用消息存储和消息处理器 。

Answer 2

You can define parameters in your proxy service :

<parameter name="transport.jms.ConcurrentConsumers">1</parameter>
<parameter name="transport.jms.MaxMessagesPerTask">1</parameter>
<parameter name="transport.jms.MaxConcurrentConsumers">1</parameter>

(adapt these values to your needs)

Furthermore, if you send a message to a back end service, you can choose to send it in a synchronous manner, using call mediator with blocking="true" : your proxy won't dequeue next jms message until it receive the response from your backend service. If, on the other hand, you use send mediator, it's asynchronous : your mediation will continue while an other thread (callback) wait for the response and therefore, your proxy will dequeue next jms message